WEATHER IN CRANBERRY CULTURE 



77 



August on the keeping quality of the two most important varieties, the Early 

 Black and the Howes. The abscissas represent temperature in May and June, 

 here computed as a summation of day degrees above 50° P.; and the ordinates, 

 the number of days with .01 inch or more of rain during July and August. The 

 heavy lines indicate approximately the normals. The upper right-hand portion 

 thus includes those ye; rs having cool springs followed by summers with less than 

 the average number of days with .01 inch or more of rain; and the lower left-hand 

 portion, those years having unusually warm springs followed by summers with 

 more than the average number of days with .01 inch or more of precipitation. 

 The abundance of fruit rots or, in other words, the keeping quality of the given 

 variety each year, is indicated by symbols. 



770 -7ZO eyo ezo ^70 -sso -470 ^20 



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Figure 2. Temperature during May and June, Frequency of Rainfall during July and August 

 at East Wareham, Massachusetts, and ttie Relative Abundance of Fruit Rots in Cranberries of 

 the Early Black Variety in the Massachusetts Crops, 1912-1935. 



Black Circles — exceptionally large losses from fruit rots. 

 Shaded Circles — losses from fruit rots larger than normal. 

 Circles with F — fair keeping quality. 

 Unshaded Circles — slight losses from fruit rots. 



